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- $Unique_ID{BRK04146}
- $Pretitle{}
- $Title{Pseudohypoparathyroidism}
- $Subject{Pseudohypoparathyroidism Martin-Albright Syndrome Seabright-Bantam
- Syndrome Turner Syndrome}
- $Volume{}
- $Log{}
-
- Copyright (C) 1988, 1989, 1990 National Organization for Rare Disorders,
- Inc.
-
- 625:
- Pseudohypoparathyroidism
-
- ** IMPORTANT **
- It is possible that the main title of this article
- (Pseudohypoparathyroidism) is not the name you expected. Please check the
- SYNONYM list to find the alternate names and disorder subdivisions covered by
- this article.
-
- Synonyms
-
- Martin-Albright Syndrome
- Seabright-Bantam Syndrome
-
- Information on the following disorders can be found in the Related
- Disorders section of this report:
-
- Turner Syndrome
-
- General Discussion
-
- ** REMINDER **
- The information contained in the Rare Disease Database is provided for
- educational purposes only. It should not be used for diagnostic or treatment
- purposes. If you wish to obtain more information about this disorder, please
- contact your physician and/or the agencies listed in the "Resources" section
- of this report.
-
-
- Pseudohypoparathyroidism is a hereditary disorder characterized by an
- inadequate response to the parathyroid hormone, although this hormone is
- present in normal amounts. This inadequate response affects bone growth in
- patients with Pseudohypoparathyroidism. Headaches, weakness, easy fatigue,
- lack of energy, and blurred vision or hypersensitivity to light may also
- occur. Unusual sensations, stiffness or cramps in arms or legs, palpitations
- and abdominal pain may be noticed. A round face, thick short stature and
- short fourth fingers are also found in patients with this disorder. Mental
- retardation also occurs. The prognosis is good for most patients. Hormonal
- and calcium replacement therapy is often useful, but the lack of growth may
- persist.
-
- Symptoms
-
- Pseudohypoparathyroidism is characterized by short stature, a round face,
- short neck, and shortened bones in the hands and feet. Intelligence usually
- ranges from low normal to mentally retarded. Headaches, weakness, tiring
- easily, lethargy, cataracts and blurred vision or hypersensitivity to light
- may also be present. During childhood, seizures may occur. Teeth with
- underdeveloped enamel tend to erupt later than normal during infancy. Levels
- of calcium in the blood are usually low, while phosphate and the parathyroid
- hormone are elevated. Patients with Pseudohypoparathyroidism can lead a
- normal life.
-
- Causes
-
- Pseudohypoparathyroidism is a hereditary disorder inherited either through X-
- linked dominant genes or through autosomal dominant genes.
-
- Human traits including the classic genetic diseases, are the product of
- the interaction of two genes, one received from the father and one from the
- mother.
-
- X-linked disorders are conditions which are coded on the X chromosome.
- Females have two X chromosomes, but males have one X chromosome and one Y
- chromosome. Therefore in females, disease traits on the X chromosome can be
- masked by the normal gene on the other X chromosome. Since males only have
- one X chromosome, if they inherit a gene for a disease present on the X, it
- will be expressed.
-
- In X-linked dominant disorders the female with only one x chromosome
- affected will develop the disease. However, the affected male always has a
- more severe condition. Sometimes affected males die before birth so that
- only female patients survive.
-
- In autosomal dominant disorders, a single copy of the disease gene
- (received from either the mother or father) will be expressed "dominating"
- the other normal gene and resulting in appearance of the disease. The risk
- of transmitting the disorder from affected parent to offspring is 50 percent
- for each pregnancy regardless of the sex of the resulting child.
-
- Related Disorders
-
- Symptoms of the following disorders can be similar to those of
- Pseudohypoparathyroidism. Comparisons may be useful for a differential
- diagnosis:
-
- Turner Syndrome is a genetic disorder affecting females which is
- characterized by lack of sexual development, small stature, possible mental
- retardation, a webbed neck, heart defects, and various other congenital
- abnormalities, often including the same deformities of the hands as in
- Pseudohypoparathyroidism. Individuals have an XO karyotype, i.e., they have
- neither the second X chromosome that characterizes females nor the Y
- chromosome of males. However, they are females. (For more information,
- choose "Turner" as your search term in the Rare Disease Database.)
-
- Therapies: Standard
-
- Pseudohypoparathyroidism is treated with the vitamin compound 1,25-
- dihydroxyvitamin D which promotes reabsorption of calcium in the kidneys.
-
- Therapies: Investigational
-
- This disease entry is based upon medical information available through
- December 1988. Since NORD's resources are limited, it is not possible to
- keep every entry in the Rare Disease Database completely current and
- accurate. Please check with the agencies listed in the Resources section for
- the most current information about this disorder.
-
- Resources
-
- For more information on Pseudohypoparathyroidism, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- PHP Self-Help Clearinghouse
- 104 Northern Parkway West
- Plainview, NY 11803
-
- National Digestive Diseases Information Clearinghouse
- Box NDDIC
- Bethesda, MD 20892
- (301) 468-6344
-
- For genetic information and genetic counseling referrals, please contact:
-
- March of Dimes Birth Defects Foundation
- 1275 Mamaroneck Avenue
- White Plains, NY 10605
- (914) 428-7100
-
- Alliance of Genetic Support Groups
- 35 Wisconsin Circle, Suite 440
- Chevy Chase, MD 20815
- (800) 336-GENE
- (301) 652-5553
-
- References
-
- EFFECTS OF ENDOGENOUS AND EXOGENOUS PARATHYROID HORMONE ON TUBULAR
- REABSORPTION OF CALCIUM IN PSEUDOHYPOPARATHYROIDISM: M. Yamamoto, et al.
-
- THE METABOLIC BASIS OF INHERITED DISEASE, 5th ed.: John B. Stanbury, et
- al., eds; McGraw Hill, 1983. Pp. 2089-1091, 2109-2110.
-
- RENAL-NONRESPONSIVE, BONE-RESPONSIVE PSEUDOHYPOPARATHYROIDISM: S.
- Dabbagh, et al.; Am Journal Dis Child (November 1984: issue 138(11)). Pp.
- 1030-1033.
-
-